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Doppler physics

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https://www.readbyqxmd.com/read/29663541/eccentric-exercise-increases-circulating-fibroblast-activation-protein-but-not-bioactive-fibroblast-growth-factor-21-in-healthy-humans
#1
Biraj Parmar, Jo E Lewis, Ricardo J Samms, Francis J P Ebling, Christine C Cheng, Andrew C Adams, Joanne Mallinson, Scott Cooper, Tariq Taylor, Reza Ghasemi, Francis B Stephens, Kostas Tsintzas
NEW FINDINGS: What is the central question of this study? The role of FGF21 as an exercise-induced myokine remains controversial. The aim of this study was to determine whether eccentric exercise would augment the release of FGF21 and/or its regulatory enzyme Fibroblast Activation Protein (FAP) from skeletal muscle tissue into the systemic circulation of healthy human volunteers. What is the main finding and its importance? Eccentric exercise does not release total or bioactive FGF21 from human skeletal muscle...
April 16, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29659117/evaluation-of-the-relationship-between-peripheral-pulse-palpation-and-doppler-systolic-blood-pressure-in-dogs-presenting-to-an-emergency-service
#2
Laura B Ateca, Erica L Reineke, Kenneth J Drobatz
OBJECTIVE: To assess the association between peripheral pulse palpation and Doppler-derived systolic blood pressure (SBP) measurement in dogs presenting to an emergency service. DESIGN: Prospective observational study. SETTING: University veterinary teaching hospital. ANIMALS: Ninety-three dogs that were presented to the emergency service. Dogs were eligible for inclusion in the study if a physical examination and a SBP measurement were performed prior to any interventions...
April 16, 2018: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/29651167/constraining-relativistic-bow-shock-properties-in-rotation-powered-millisecond-pulsar-binaries
#3
Zorawar Wadiasingh, Alice K Harding, Christo Venter, Markus Böttcher, Matthew G Baring
Multiwavelength followup of unidentified Fermi sources has vastly expanded the number of known galactic-field "black widow" and "redback" millisecond pulsar binaries. Focusing on their rotation-powered state, we interpret the radio to X-ray phenomenology in a consistent framework. We advocate the existence of two distinct modes differing in their intrabinary shock orientation, distinguished by the phase-centering of the double-peaked X-ray orbital modulation originating from mildly-relativistic Doppler boosting...
April 20, 2017: Astrophysical Journal
https://www.readbyqxmd.com/read/29644301/pseudoaneurysm-of-brachial-artery-a-rare-cause-of-median-nerve-compression
#4
João Lobo, Mariana Cunha Ferreira, Pedro Negrão Ramos
Background: The authors present an unusual clinical case of high median nerve compression caused by an iatrogenic pseudoaneurysm of the brachial artery after an angiography with a follow up of 9 months. Methods: A 73-year-old male was seen with progressive numbness, loss of opponency and diminution of strength of finger flexion in the left hand after an angiography with direct puncture of the left humeral artery. Physical examination revealed a hard consistency internal distal arm swelling with the size of a walnut, non-pulsatile and with a Tinel sign on percussion...
April 2018: Trauma Case Reports
https://www.readbyqxmd.com/read/29643156/indecho-study-cohort-study-investigating-birth-size-childhood-growth-and-young-adult-cardiovascular-risk-factors-as-predictors-of-midlife-myocardial-structure-and-function-in-south-asians
#5
Senthil K Vasan, Ambuj Roy, Viji Thomson Samuel, Belavendra Antonisamy, Santosh K Bhargava, Anoop George Alex, Bhaskar Singh, Clive Osmond, Finney S Geethanjali, Fredrik Karpe, Harshpal Sachdev, Kanhaiya Agrawal, Lakshmy Ramakrishnan, Nikhil Tandon, Nihal Thomas, Prasanna S Premkumar, Prrathepa Asaithambi, Sneha F X Princy, Sikha Sinha, Thomas Vizhalil Paul, Dorairaj Prabhakaran, Caroline H D Fall
INTRODUCTION: South Asians have high rates of cardiovascular disease (CVD) and its risk factors (hypertension, diabetes, dyslipidaemia and central obesity). Left ventricular (LV) hypertrophy and dysfunction are features of these disorders and important predictors of CVD mortality. Lower birth and infant weight and greater childhood weight gain are associated with increased adult CVD mortality, but there are few data on their relationship to LV function. The IndEcho study will examine associations of birth size, growth during infancy, childhood and adolescence and CVD risk factors in young adulthood with midlife cardiac structure and function in South Asian Indians...
April 10, 2018: BMJ Open
https://www.readbyqxmd.com/read/29622181/mitral-valve-regurgitation-in-the-contemporary-era-insights-into-diagnosis-management-and-future-directions
#6
REVIEW
Abdallah El Sabbagh, Yogesh N V Reddy, Rick A Nishimura
Mitral valve regurgitation (MR) is the most common valvular heart disease. Primary MR is a disease of the mitral valve apparatus, whereas secondary MR is a disease of the left ventricle. Diagnosing and managing MR is often challenging and requires a structured approach, integrating findings on history, physical examination, and imaging. Decisions regarding treatment depend on knowledge of the etiology, natural history, and outcome of interventions for these patients with mitral valve disease. The optimal timing of intervention requires a comprehensive 2-dimensional and Doppler echocardiogram in each patient to determine the cause of the mitral valve disease, the severity of the regurgitation, and the effect of the volume overload on the left ventricle, as well as determining if a durable valve repair can be performed...
April 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29615421/photoplethysmography-using-a-smartphone-application-for-assessment-of-ulnar-artery-patency-a-randomized-clinical-trial
#7
Pietro Di Santo, David T Harnett, Trevor Simard, F Daniel Ramirez, Ali Pourdjabbar, Altayyeb Yousef, Robert Moreland, Jordan Bernick, George Wells, Alexander Dick, Michel Le May, Marino Labinaz, Derek So, Pouya Motazedian, Richard G Jung, Jaya Chandrasekhar, Roxana Mehran, Aun-Yeong Chong, Benjamin Hibbert
BACKGROUND: Radial artery access is commonly performed for coronary angiography and invasive hemodynamic monitoring. Despite limitations in diagnostic accuracy, the modified Allen test (manual occlusion of radial and ulnar arteries followed by release of the latter and assessment of palmar blush) is used routinely to evaluate the collateral circulation to the hand and, therefore, to determine patient eligibility for radial artery access. We sought to evaluate whether a smartphone application may provide a superior alternative to the modified Allen test...
April 3, 2018: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
https://www.readbyqxmd.com/read/29604750/pdv-based-estimation-of-ejecta-particles-mass-velocity-function-from-shock-loaded-tin-experiment
#8
J-E Franzkowiak, G Prudhomme, P Mercier, S Lauriot, E Dubreuil, L Berthe
A metallic tin plate with a given surface finish of wavelength λ ≃ 60 μm and amplitude h ≃ 8 μm is explosively driven by an electro-detonator with a shock-induced breakout pressure PSB = 28 GPa (unsupported). The resulting dynamic fragmentation process, the so-called "micro-jetting," is the creation of high-speed jets of matter moving faster than the bulk metallic surface. Hydrodynamic instabilities result in the fragmentation of these jets into micron-sized metallic particles constituting a self-expanding cloud of droplets, whose areal mass, velocity, and particle size distributions are unknown...
March 2018: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29578416/-distant-consequences-and-the-quality-of-life-of-patients-with-military-related-craniocerebral-trauma
#9
I Chernenko, N Kufterina, V Mishchenko, I Voloshin-Gaponov
The purpose of the study was to determine appropriate diagnostic, therapeutic and rehabilitation treatments of patients with military-related craniocereberal trauma. We have examined 180 male patients: 100 participant of operations in the Democratic Republic Afghanistan (1979-1989) and 80 - participants of conflict in the east of Ukraine (from 2014 until present) with military-related craniocereberal trauma of varying severity. We used clinical-neurological, instrumental (craniography of skull, magnetic resonance imaging, ultrasonic doppler sonography of the main vessels of the head and neck), biochemical, statistical methods of a research, and also questionnaire scale SF-36...
February 2018: Georgian Medical News
https://www.readbyqxmd.com/read/29569259/varicocele-is-the-root-cause-of-bph-destruction-of-the-valves-in-the-spermatic-veins-produces-elevated-pressure-which-diverts-undiluted-testosterone-directly-from-the-testes-to-the-prostate
#10
M Goren, Y Gat
In varicocele, there is venous flow of free testosterone (FT) directly from the testes into the prostate. Intraprostatic FT accelerates prostate cell production and prolongs cell lifespan, leading to the development of BPH. We show that in a large group of patients presenting with BPH, bilateral varicocele is found in all patients. A total of 901 patients being treated for BPH were evaluated for varicocele. Three diagnostic methods were used as follows: physical examination, colour flow Doppler ultrasound and contact liquid crystal thermography...
March 22, 2018: Andrologia
https://www.readbyqxmd.com/read/29558507/clinical-and-ultrasonographic-features-of-male-breast-tumors-a-retrospective-analysis
#11
Wei-Hsin Yuan, Anna Fen-Yau Li, Yi-Hong Chou, Hui-Chen Hsu, Ying-Yuan Chen
OBJECTIVE: The purpose of this study was to determine clinical and ultrasonographic characteristics of male breast tumors. METHODS: The medical records of male patients with breast lesions were retrieved from an electronic medical record database and a pathology database and retrospectively reviewed. A total of 112 men (125 breast masses) with preoperative breast ultrasonography (US) were included (median age, 59.50 years; age range, 15-96 years). Data extracted included patient age, if the lesions were bilateral, palpable, and tender, and the presence of nipple discharge...
2018: PloS One
https://www.readbyqxmd.com/read/29541036/influence-of-football-on-physiological-cardiac-indexes-in-professional-and-young-athletes
#12
Cristian V Francavilla, Francesco Sessa, Monica Salerno, Giuseppe D Albano, Ines Villano, Giovanni Messina, Fabio Triolo, Lorenzo Todaro, Maria Ruberto, Gabriella Marsala, Orazio Cascio, Maria P Mollica, Vincenzo Monda, Giuseppe Cibelli, Anna Valenzano, Christian Zammit, Marcellino Monda, Antonietta Messina
Background: After long-term intensive training, considerable morphological and functional heart changes occur in professional athletes. Such changes arise progressively and regress upon interruption of the physical activity. Morphological and functional alterations on heart are known as "Athlete's heart" condition. Objective: This study aims to compare echocardiographic parameters in two different groups of professional athletes. Furthermore, a prospective study is performed analyzing the echocardiographic changes occurring in 12 professional players in 3 years of follow-up...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29524055/morphometric-and-vascular-modifications-of-the-clitoris-during-pregnancy-a-longitudinal-pilot-study
#13
Cesare Battaglia, Nicola Persico, Isabella Zanetti, Francesca Guasina, Mara Mattioli, Paolo Casadio, Elena Morotti
During pregnancy, women go through a series of physical and emotional changes that may have an impact on their sexuality. The aim of the study was to examine modifications in sexual function during pregnancy by means of translabial ultrasonography and administration of questionnaires on sexual activity. Eighteen healthy and adult (25-35 years) pregnant women without sexual dysfunction and with a stable heterosexual relationship were examined at 10-12, 18-20, and 30-32 weeks of gestation. Patients underwent ultrasonographic translabial clitoral volume and labia minora thickness measurements and color Doppler assessment of the dorsal clitoral and posterior labial arteries...
March 9, 2018: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/29522872/external-validation-and-evaluation-of-reliability-of-the-farp-2-score-to-predict-early-graft-failure-after-infrainguinal-bypass
#14
Mazlum Sahin, Helin El
AIM: To evaluate the accuracy of the FARP2 scoring system in predicting early graft failure after infrainguinal bypass surgery (IBS). METHODS: Patient charts which underwent IBS between January 2014 and January 2017 , in two tertiary academic centers were evaluated retrospectively. In follow ups, one week after operation, detailed physical examination was done and doppler ultrasonography was performed one month after operation and integrity of the graft was evaluated...
March 6, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29516004/reference-values-for-physical-stress-echocardiography-in-asymptomatic-patients-after-mitral-valve-repair
#15
Rosemarijn Jansen, Kim Urgel, Maarten J Cramer, Egidius E H L van Aarnhem, Peter P M Zwetsloot, Pieter A Doevendans, Jolanda Kluin, Steven A J Chamuleau
Background: Clinical decision-making in symptomatic patients after mitral valve (MV) repair remains challenging as echocardiographic reference values are lacking. In native MV disease intervention is recommended for mean transmitral pressure gradient (TPG) >15 mmHg or systolic pulmonary artery pressure (SPAP) >60 mmHg at peak exercise. Insight into standard stress echo parameters after MV repair may therefore aid to clinical decision-making during follow-up. Hypothesis: Stress echocardiography derived parameters in asymptomatic patients after successful MV repair differ from current guidelines for native valves...
2018: Frontiers in Surgery
https://www.readbyqxmd.com/read/29511665/acute-effects-of-one-session-dry-needling-on-a-chronic-golfer-s-elbow-disability
#16
Ardalan Shariat, Pardis Noormohammadpour, Amir Hossein Memari, Noureddin Nakhostin Ansari, Joshua A Cleland, Ramin Kordi
A 40-year-old retired male elite athlete with more than 20 years' experience in wrestling and bodybuilding with mild elbow pain and disability of 2 years presented to our clinic reporting an acute pain in medial aspect of the elbow. Physical examination revealed symptoms of left Golfer's elbow during target-directed movements. The results of sonography in left elbow showed low level of hypo echo irregularity and increased blood flow in color Doppler mode in the common flexor origin. The pain amplitude was moderate at rest and extremely high during kinetic and intentional movements...
February 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29505520/ultrasonographic-manifestations-of-a-rare-granular-cell-tumor-of-the-accessory-breast-a-case-report
#17
Haotian Liu, Meiying Tao, Hongyu Ding, Peipei Zhang
RATIONALE: The ultrasound manifestations of granular cell tumor (GCT) is a consequence of the histopathological characteristic of the tumor and can be distinguished from breast cancer. PATIENT CONCERNS: A GCT is a rare, benign, hyperplasia-based lesion. Approximately 1% to 2% of GCTs are malignant. About 5% to15% of the cases occur in the breast, and it is relatively rare in the axillary accessory breast. There are no effective preventive measures for GCTs, early detection combined with a thorough and wide complete resection of the tumor remains the best treatment for a favorable outcome...
January 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29495906/safety-of-a-physical-therapy-protocol-for-women-with-preeclampsia-a-randomized-controlled-feasibility-trial
#18
Tawana Vicente Bertagnolli, Michelle de Souza Rangel Machado, Cristine Jorge Homsi Ferreira, Jackeline de Souza Rangel Machado, Geraldo Duarte, Ricardo Carvalho Cavalli
OBJECTIVE: To assess the feasibility and safety of a physiotherapy protocol applied to pregnant women with preeclampsia. METHODS: Randomized, controlled, single-blind feasibility study, with 24 hospitalized pregnant women with preeclampsia. The intervention group received one session of the physiotherapy. The control group remained under the routine care of the hospital. The primary outcomes were Doppler velocimetry, cardiotocography, and maternal-fetal hemodynamics...
March 1, 2018: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/29495796/importance-of-rotational-adiabaticity-in-collisions-of-co-2-super-rotors-with-ar-and-he
#19
Matthew J Murray, Hannah M Ogden, Amy S Mullin
The collision dynamics of optically centrifuged CO2 with Ar and He are reported here. The optical centrifuge produces an ensemble of CO2 molecules in high rotational states (with J ∼ 220) with oriented angular momentum. Polarization-dependent high-resolution transient IR absorption spectroscopy was used to measure the relaxation dynamics in the presence of Ar or He by probing the CO2 J = 76 and 100 states with Erot =2306 and 3979 cm-1 , respectively. The data show that He relaxes the CO2 super rotors more quickly than Ar...
February 28, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29495699/towards-acoustic-particle-velocity-sensors-in-air-using-entrained-balloons-measurements-and-modeling
#20
Randall P Williams, Donghwan Kim, Kristofer L Gleason, Neal A Hall
In this article, the feasibility of using balloons for the measurement of acoustic particle velocity in air is investigated by exploring the behavior of an elastic balloon in air as it vibrates in response to an incident acoustic wave. This is motivated by the frequent use of neutrally buoyant spheres as underwater inertial particle velocity sensors. The results of experiments performed in an anechoic chamber are presented, in which a pair of laser Doppler vibrometers simultaneously captured the velocities of the front and back surfaces of a Mylar balloon in an acoustic field...
February 2018: Journal of the Acoustical Society of America
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